The Co-op video was released and removed by gametrailers, but luckily an aware member got hold of the video which is now posted on youtube and can be seen here:

A new video was found here:

This video’s sound is much better and seems to be much nicer quality wise.

# Update
720p High Def can be found here

A new video was found today by: NeedFood, the video in question shows us gameplay and some basic information of multiple vehicles, the vehicles in question are two LAV’s, Two Helicopters, One AA and Two FAV’s.